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kern/40097: MODULAR tries to unload non-module subsystems



>Number:         40097
>Category:       kern
>Synopsis:       MODULAR tries to unload non-module subsystems
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 03 14:45:00 +0000 2008
>Originator:     bouyer%antioche.lip6.fr@localhost
>Release:        NetBSD 5.99.3
>Organization:
>Environment:
System: NetBSD tzigane.soc.lip6.fr 5.99.3 NetBSD 5.99.3 (XEN3_DOMU) #3: Fri Nov 
28 13:03:11 CET 2008  
bouyer@roll:/dsk/l1/misc/bouyer/tmp/amd64/obj/dsk/l1/misc/bouyer/current/src/sys/arch/amd64/compile/XEN3_DOMU
 amd64
Architecture: amd64
Machine: amd64
>Description:
        a kernel with options MODULAR but some systems compiled in kernel
        (typically a xen kernel) gets is console spammed with
WARNING: module error: module `cd9660' busy
WARNING: module error: module `coda' busy
WARNING: module error: module `ffs' busy
WARNING: module error: module `fdesc' busy
WARNING: module error: module `kernfs' busy
WARNING: module error: module `msdosfs' busy
WARNING: module error: module `nfs' busy
WARNING: module error: module `ntfs' busy
WARNING: module error: module `nullfs' busy
WARNING: module error: module `overlay' busy

        when memory becomes low. This eats a lot of system time ...

>How-To-Repeat:
        boot a default Xen kernel, run a memory-heavy program
>Fix:
        don't try to unload things that have been compiled in statically.



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